Meaning

Hearing what Prime Minister Chu said, Junyi brightened - was he going to talk with him about the Heir?

Junyi replied politely, "Please, Prime Minister Chu."

They had just gotten back to the Li Village, where they were resting. Chu Tian had already gotten a simple place for them to spend the night.

Chu Tian pointed at the chair, telling Junyi to take a seat.

Junyi had been hesitating - he had wanted to show respect, but since he was working on behalf of the Heir it wasn't proper for him to stand while he was speaking. So he sat down.

Despite being seated, he held his back straight, showing courtesy.

Chu Tian wasn't being that serious.